Long-term fluoride release from resin-reinforced orthodontic cements following recharge with fluoride solution

Santos, Rogério Lacerda dos; Pithon, Matheus Melo; Vaitsman, Delmo Santiago; Araújo, Mônica Tirre de Souza; Souza, Margareth Maria Gomes de; Nojima, Matilde Gonçalves

doi:10.1590/s0103-64402010000200002

Cited by 23 publications

(25 citation statements)

References 14 publications

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“…Glass ionomers (GIs) are considered important in this regard due to their exceptionally high fluoride release (3,4). Multiple factors, including daily exposure to fluoridated dentifrices, affect the release of fluoride from GIs (5-7).…”

Section: Introductionmentioning

confidence: 99%

Effect of brushing with two different abrasives on fluoride release by high-viscosity glass ionomer cement

Nassar

Platt

2015

J Oral Sci

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Keywords: topical fluoride; glass ionomer cements; toothbrushing; abrasion. IntroductionFluoride release from restorative materials has been proposed as a possible mechanism to reduce the occurrence of dental caries (1,2). Glass ionomers (GIs) are considered important in this regard due to their exceptionally high fluoride release (3,4). Multiple factors, including daily exposure to fluoridated dentifrices, affect the release of fluoride from GIs (5-7). Exposure to 1,250 ppm fluoride slurry for 5 min was shown to significantly increase fluoride release from compomer specimens (8). Furthermore, fluoride re-release from GIs is reportedly increased by brushing the specimens instead of merely storing them in a dentifrice slurry (9). A lower, but more transient and sustained, fluoride release has shown to play a significant role in caries prevention (10). To the best of our knowledge, the effect of brushing with dentifrice slurries containing different abrasive levels on fluoride release of high-viscosity GIs has not been previously reported. Slurries with high abrasive content could enhance fluoride release from GIs owing to the faster abrasion of such materials and exposing deeper, more fluoride-rich layers.The main objective of this study was to investigate the effect of brushing with two levels of abrasives on fluoride release from high-viscosity GIs. We hypothesized that brushing with slurries containing higher abrasive levels would enhance fluoride release from the GI material. Materials and Methods Specimen preparationTo minimize the possible effects of pigments and other GI ingredients, a single shade (A2) of a high-viscosity GI

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Section: Introductionmentioning

confidence: 99%

Effect of brushing with two different abrasives on fluoride release by high-viscosity glass ionomer cement

Nassar

Platt

2015

J Oral Sci

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“…1,2 Considering that deficient oral hygiene generally is a reason why it is difficult to achieve successful orthodontic treatment, it is necessary for the dentist to implement an individualized model of a program of preventive education for each patient. 3 In individuals who cannot or are unable to perform good oral hygiene, in addition to mechanical control, it is important to implement chemical plaque control.…”

Section: Introductionmentioning

confidence: 99%

Does chlorhexidine in different formulations interfere with the force of orthodontic elastics?

Pithon

Santana

Sousa

et al. 2012

The Angle Orthodontist

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Objective: To evaluate the effects of different concentrations of chlorhexidine on the decline in force of orthodontic elastics. Materials and Methods: In a laboratory study, five groups of samples were tested, with one control group represented by distilled water (group 1) and four experimental groups: 0.12% manipulated chlorhexidine (group 2), 0.2% manipulated chlorhexidine (group 3), 0.12% chlorhexidine gluconate-based oral solution (0.12% Periogard; group 4), and 0.2% Cleanform mouthwash (formula and action; group 5). The test groups were submersed in artificial saliva at 37uC. Templates were used and submerged in the chlorhexidine solutions for 30 seconds twice a day. Force was measured with a digital dynamometer at six different time intervals: 0, 1, 7, 14, 21, and 28 days. Results: No statistical differences were found among the groups in the initial period, at 24 hours, and at 7 days (P . .05). There were statistical differences between groups 2 and 5 at 14 days of the experiment and between group 1 and the others at 28 days. In the initial period, the force was statistically higher than it was at any of the other periods of the experiment (P , .05). Conclusion: In the present study, chlorhexidine showed no significant influence on the force degradation of the chain elastics tested. (Angle Orthod. 2013;83:313-318.)

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“…All these shortcomings led to the introduction of fluoride-releasing composite resins for clinical purposes. However, the use of these materials were later discontinued either due to an increased incidence of bond failure or because composite resin released of bond failure or because composite resin released of bond fluoride in very small amounts (6,7).…”

Section: Introductionmentioning

confidence: 99%

“…The favorable characteristics of GICs include continuous fluoride release, acting as a reservoir of fluoride absorbed from toothpastes and oral rinses (6), both inhibiting bacterial acid metabolism and activity (9) and minimizing enamel decalcification (6); biocompatibility; chemical bonding both to enamel and dentin that makes etching treatment of enamel unnecessary (3); effective bonding in a moist environment without the need for an additional bonding agent layer; and higher frequency of bond failure either at the adhesive-bracket interface or cohesive fracture in the material, avoiding damage to enamel (9). From an orthodontic perspective, one of the disadvantages of GICs is their lower bonding strength to brackets when compared to composite resins (3,8,9).…”

Section: Introductionmentioning

confidence: 99%

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

et al. 2010

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The aim of this study was to assess the influence of etching and light-curing time on the shear bond strength (SBS) and adhesive remnant index (ARI) of a resin-modified glass ionomer cement (RMGIC) upon debonding of orthodontic brackets. Sixty-eight bovine permanent incisors were obtained and embedded in acrylic resin. Edgewise metallic brackets were bonded to the teeth with Fuji Ortho LC RMGIC. The specimens were randomly assigned to 4 groups, using the following etching and light-curing times: G1: 10% polyacrylic acid and 40 s (control); G2: 37% phosphoric acid and 40 s; G3: 10% polyacrylic acid and 50 s; and G4: 37% phosphoric acid and 50 s. Shear test was performed at 0.5 mm/min and the ARI was assessed. G2 (3.6 ± 0.98 MPa) presented significantly higher (p<0.05) SBS than G1 (2.76 ± 0.86 MPa) and G4 (2.86 ± 0.68 MPa), and there was no statistically significant difference (p>0.05) between G2 and G3 (2.94 ± 0.67 MPa). ARI presented prevalence of scores 2 and 3 in all groups. RMGIC SBS enhanced with 37% phosphoric acid etching and 40 s light-curing time, but this did not occur when the light-curing time was increased, regardless of the acid used. RMGIC presented prevalence of failures at the adhesive/bracket interface.

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Long-term fluoride release from resin-reinforced orthodontic cements following recharge with fluoride solution

Cited by 23 publications

References 14 publications

Effect of brushing with two different abrasives on fluoride release by high-viscosity glass ionomer cement

Effect of brushing with two different abrasives on fluoride release by high-viscosity glass ionomer cement

Does chlorhexidine in different formulations interfere with the force of orthodontic elastics?

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

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